[LED Timer]

Thanks MP, that's really interesting!  I like this idea and I'm looking at the datasheet.  What would be the easiest way of feeding it a slow voltage increasing from 0v to 5v or 9v?  Can it be done with a simple capacitor charging circuit?  If so, I'll have a look for some information and try to build one.

Ideally I'd like the circuit to work with as little battery power as possible and this seems like a good solution.

Thanks again!

[LED Timer]

Thanks for your ideas!

[LED Timer]

I would like to make a simple timer with a number of LEDs to show how much time has gone by.